From: Mikael Magnusson <mikachu@gmail.com>
Date: Mon, 01 Sep 2008 14:42:44 GMT
Subject: Re: [PATCH] git wrapper: DWIM mistyped commands
Message-ID: <237967ef0809010742w43de9e3dj28880de484e8c48d@mail.gmail.com>
In-Reply-To: <20080831135023.GA6616@blimp.local>

2008/8/31 Alex Riesen <raa.lkml@gmail.com>:
> From: Johannes Schindelin <Johannes.Schindelin@gmx.de>
>
> This patch introduces a modified Damerau-Levenshtein algorithm into
> Git's code base, and uses it with the following penalties to show some
> similar commands when an unknown command was encountered:
>
>        swap = 0, insertion = 1, substitution = 2, deletion = 4
>
> A typical output would now look like this:
>
>        $ git sm
>        git: 'sm' is not a git-command. See 'git --help'.
>
>        Did you mean one of these?
>                am
>                rm
>
> The cut-off is at similarity rating 6, which was empirically determined
> to give sensible results.
>
> As a convenience, if there is only one candidate, Git continues under
> the assumption that the user mistyped it.  Example:
>
>        $ git reabse
>        WARNING: You called a Git program named 'reabse', which does
>        not exist.
>        Continuing under the assumption that you meant 'rebase'
>        [...]

> Mikael, this also might fix the crash you're seeing: the heap was
> corrupted by clean_cmdnames(&other_cmds) names members of which were
> moved to main_cmds.

It doesn't crash now, but the cut-off appears ineffective:
% git aaaaaaaaaaaaaaa
WARNING: You called a Git program named 'aaaaaaaaaaaaaaa', which does not exist.
Continuing under the assumption that you meant 'add--interactive'
in 2.0 seconds automatically...

By my estimate, that should have a score above 6 :).

-- 
Mikael Magnusson